<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <!-- Array,Object,Function,Math,Date -->
    
    <script>
        /* Math.ceil
        Math.floor
        Math.round
        Math.max
        Math.min
        Math.random */
        /* 1-100之间的随机数  1<=num<=100 */
        console.log(Math.floor(Math.random()*100)+1)
    </script>
</body>
</html>